it's a narrative construct allowing the principal protaganists to transit from story to story with ease.
This could also be said about the Enterprise
in Star Trek
or the Millenium Falcon
in Star Wars
. In fact, this accurately describes every vehicle in fiction. This however has never stopped a specific group of fans to draw detailed schematics or deckplans and write detailed articles or even entire tech manuals on those ships and every minute detail of their technology.
It's as valid an angle to view a show as concentrating on any other aspect of that show, e.g. character-development.